compositions



106. coMPosmoNs,

comma 0R PLAST'C Iu carrying out my iiiventiou parts; cernen four parts; pounded shells; cariignate e of lime rec parts; lithar e, one pa [DIX m l ninety-nine parts; w ere y waited $11125 Cross Reference CARL SGHAEFFER, Oii ELIZABETH, NEW JERSEY.

Lam Patent No. 1o5,132, dated July 5, 1370.

, mflchodnllnfonldtotnthooomnPntlatindmportdthlm ted'sulphuric ac id Wl1ich,iif'r aving been molded To the rddird'ibim or shape, is treated with a solution otlsilicategfpgtash, in such a manner that, by the action of the silicate, the pounded shells or carbonate of lime, and the litharge, are transformed into silicates of l irng and lead, and thereby the entire mass is .rendered very him, and ,capable of resisting the changes of the atmosphere. 7

I take, sand eight an su crent water to formal p astic mass, which is pressed in molds 0 re required shape.

TIEiFi-icles thus produced are then dried for five or six days, at a temperature of sixtyjp sixty-si t degrges and, after that, they are introduced in a solutildg composed g silicate of tash two parts; water e carbonate of lime is transformed into silicate of lime, and the litharge 'caused to combine with a portion of the silicic acid, sons to form silicate of lead and, by the silicates of lime and lead us pr see in the mass, the articles and capable or resisting moistare rendered very hard the atmosphere.

are and the changes oi Examiner 15 Litharge is dissolved in diluted s %l phurio acid, and z w pvcsi.

1e stan mg for tw' do a so that it truism hate 0 lead; -By adding tl ls 5111mm to the reufifi'iiim gredients, a portion of the carbonate othine is transformed into so] hate of iime, while the lead enters in combination 6% the 95355 gig a oid, and, by the action of the sulphate of lime and grbonate of lead thus distributed through the mass, a certain egree of elasticity is imparted to the stone, which materially preserves its durability.

After removing the tash, they are dried from ten to fourteen Wm". EEey are ready me. e

I am aware that a block of sand and lime treated with silicate of soda is not new; therefore such I do not claim, but

articles from the solution of What I claim as new, and desire to secure by Let- January, 187.0.-

. I CARL SGHAEFFER.

Witnesses: i

W. HAUFF,' E. F. KABTENHUBEB. 

